Article: Collector's corner. (Watch World).(Seiko Corp.)(Brief Article)

Seiko, the Japanese watchmaker known for its high-tech watches, has entered the collectible luxury watch market with its limited-edition Seiko Spring Drive, a hand-wound timepiece combining mechanical and electronic watchmaking. Its mainspring drives the smooth sweep movement of the large hands and powers a rotor whose tiny electrical output induces a quartz crystal to emit a reference signal. An integrated circuit measures any divergence between the singal and the rate at which the spring unwinds and makes adjustments. The watch is accurate to ...

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